/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 *
 * This file is part of MjSip (http://www.mjsip.org)
 *
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MjSip is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author(s):
 * Luca Veltri (luca.veltri@unipr.it)
 */

package org.zoolu.sip.transaction;



import org.zoolu.sip.provider.*;
import org.zoolu.sip.message.*;


/** ACK client transaction should follow an INVITE client transaction within an INVITE Dialog in a SIP UAC.
 * The AckTransactionClient simply sends an ACK request message and terminates.
 */
public class AckTransactionClient extends Transaction
{

    /** the TransactionClientListener that captures the events fired by the AckTransactionClient */
    TransactionClientListener transaction_listener;


    /** Creates a new AckTransactionClient. */
    public AckTransactionClient(SipProvider sip_provider, Message ack, TransactionClientListener listener)
    {  super(sip_provider);
        request=new Message(ack);
        transaction_listener=listener;
        transaction_id=request.getTransactionClientId();
    }

    /** Starts the AckTransactionClient and sends the ACK request. */
    public void request()
    {
        sip_provider.sendMessage(request);
        changeStatus(STATE_TERMINATED);
        //if (transaction_listener!=null) transaction_listener.onAckCltTerminated(this);
        // (CHANGE-040421) free the link to transaction_listener
        transaction_listener=null;
    }

    /** Method used to drop an active transaction. */
    public void terminate()
    {  changeStatus(STATE_TERMINATED);
        // (CHANGE-040421) free the link to transaction_listener
        transaction_listener=null;
    }
}
